Patent US3557340A successfully refreshed from Google Patents.
US3557340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selenium bearing wire for steel welding
Assignee: L-Tec Co
•
Filing: 1969-04-04
•
Granted: 1971-01-19
•
Expires: 1989-04-04
Abstract
Abstract The addition of .04-3 percent-wt. of selenium to any ferrous filler wire composition improves the wettability property of the weld metal and substantially eliminates undercut.
Inventors
- 👤 Pramod Kumar Srivastava
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:03
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/38; B23K35/383; B23K35/24; B23K35/30; B23K35/3053
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A method of joining materials by arc welding said materials with a consumable ferrous electrode comprising: discharging a stream of shielding gas consisting essentially of a commercially pure inert gas and an oxidizing gas having the effect of at least one-eighth volume percent oxygen but less than one-half volume percent oxygeN against said materials to be joined, striking an arc in such gas shielding stream to form a weld puddle, and feeding said ferrous electrode into said puddle characterized in that said ferrous electrode includes at least .04 percent-wt. selenium for substantially eliminating undercut.
Claim 2
Independent Claim
94 words
A method of joining materials by arc welding said materials with a consumable ferrous electrode comprising: discharging a stream of shielding gas consisting essentially of a commercially pure inert gas and an oxidizing gas having the effect of at least one-eighth volume percent oxygen but less than one-half volume percent oxygeN against said materials to be joined, striking an arc in such gas shielding stream to form a weld puddle, and feeding said ferrous electrode into said puddle characterized in that said ferrous electrode includes at least .04 percent-wt. selenium for substantially eliminating undercut.
Claim 3
Dependent Claim
15 words
A method of joining materials as defined in claim 3 wherein said ferrous electrode comprises:
Claim 4
Dependent Claim
70 words
Gas shielded metal arc welding which comprises discharging a stream of shielding gas against a steel workpiece to be welded, striking an electric welding arc in such gas shielding stream and feeding a bare metal wire electrode into such arc, characterized in that the shielding gas consists of a mixture of commercially pure argon with less than about one-half percent oxygen and such electrode wire is composed of by weight:
Claim 5
Dependent Claim
70 words
Gas shielded metal arc welding which comprises discharging a stream of shielding gas against a steel workpiece to be welded, striking an electric welding arc in such gas shielding stream and feeding a bare metal wire electrode into such arc, characterized in that the shielding gas consists of a mixture of commercially pure argon with less than about one-half percent oxygen and such electrode wire is composed of by weight:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |